[Illustration: FIG. 250.--Shield from the tomb of Prince Edmund of Langley. Early Fifteenth Century.] Other heraldic crowns are the mural crown, representing a fortified wall (Fig. 251), and the naval crown, composed of sails and sterns of ships (Fig. 252), and both are at the present time restricted with care, in the cases of new grants or augmentations, to circumstances in which their obvious symbolism applies. [Illustration: FIG. 251.] [Illustration: FIG. 252.] [Illustration: FIG. 253.] The mural crown is usually composed in our heraldry of the simple crenellations shown in the example. Abroad, however, a more elaborate and picturesque form occurs in the form of a castellated wall showing three towers at intervals. [Illustration: FIG. 254.] [Illustration: FIG. 255.] The crown vallery is intended to represent palisades, as in Fig. 253, and when the palisades are more definite and are fastened to the rim instead of rising out of it, the crown is palisado instead of vallery (Fig. 254). The Eastern crown, sometimes called an antique crown, is formed of five straight rays (Fig. 255), and when in addition there is a star on each point it becomes a celestial crown. CRESCENT.--This charge, beautiful as it appears in the badges connected with Henry II of France and Diana of Poitiers, has come to be drawn clumsily as to look more like a biscuit with a bite out of it than a graceful shape derived from the crescent moon. When it is simply described as a crescent it always has its points upwards, and it becomes a decrescent if they point to the sinister, and an increscent when they are pointed to the dexter. Still rarer as a charge than these latter is the full moon, and when she thus occurs she is blazoned a Moon in her Plenitude. It is understood that the proportionate thickness of a crescent may be any that is felt to be in harmony with the general character of the design that accompanies it. ESCALLOP SHELL.--This beautiful charge, with its radiating lines within its outline, appears to have been specially connected with the Crusades as the pilgrim’s badge, as such being sewn on to the cloak or hat. Later the shells so worn were sometimes elaborately painted in the manner of the illuminators, in memory of the pilgrimage. The escallop is especially associated with St. James, and so frequently occurs in Spanish decoration such as that of the House of the Shells, Saragossa, the whole front of which is semée of escallops in high relief. Also, an old writer says: “The shell thereof is the fairest instrument that can be, being of nature’s making, which for the beauties sake is put in the collars of Saint Michael’s Order.” ESTOILE.--A star of six wavy points. [Illustration: FIG. 256.]